HP Archive Backup System for OpenVMS Guide to Operations

• Free Space is 20
Remote Devices
8.4 Monitoring and Tuning Network Performance
This is below the recommended free space amount of 30. This also indicates that LRPCOUNT
should be raised. Raising LRPCOUNT to 50 (when there are currently 36 LRPs) has the effect of
adding 14 LRPs. Fourteen plus the 20 free space equals over 30. This means that the recommended
value of 30 free space LRPs is met after LRPCOUNT is set to 50.
• The SYSGEN parameter LRPCOUNTV (LRP count virtual) has been set to 200.
The LRPCOUNTV parameter should be at least four times LRPCOUNT. Raising LRPCOUNT
may mean that LRPCOUNTV has to be raised. In this case, LRPCOUNTV does not have to be
raised because 200 is exactly four times 50 (the new LRPCOUNT value).
Make changes to LRPCOUNT or LRPCOUNTV in both:
– SYSGEN (using CURRENT)
– SYS$SYSTEM:MODPARAMS.DAT file (for when AUTOGEN is run with REBOOT)
Example: Changing LRPCOUNT to 50 in SYSGEN
Username: SYSTEM
Password: (the system password)
$ SET DEFAULT SYS$SYSTEM
$ RUN SYSGEN
SYSGEN> USE CURRENT
SYSGEN> SH LRPCOUNT
Parameter Name Current Default Minimum Maximum
LRPCOUNT 25 4 0 4096
SYSGEN> SET LRPCOUNT 50
SYSGEN> WRITE CURRENT
SYSGEN> SH LRPCOUNT
Parameter Name Current Default Minimum Maximum
LRPCOUNT 50 4 0 4096
Requirement:
After making changes to SYSGEN, reboot your system so the changes take effect.
Example: Changing the LRPCOUNT for AUTOGEN
Add the following line to MODPARAMS.DAT:
Result:
NETACP BYTLM
$ MIN_LRPCOUNT = 50 ! ADDED {the date} {your initials}
This ensures that when AUTOGEN runs, LRPCOUNT is not set below 50.
The default value of NETACP is a BYTLM setting of 65,535. Including overhead, this is enough
for only 25 to 30 line receive buffers. This default BYTLM may not be enough.
Recommendation:
Increase the value of NETACP BYTLM to 110,000.
How to increase NETACP BYTLM:
Before starting DECnet, define the logical NETACP$BUFFER_ LIMIT by entering:
$ DEFINE/SYSTEM/NOLOG NETACP$BUFFER_LIMIT 110000
$ @SYS$MANAGER:STARTNET.COM
Remote Devices 8–7